Theory

Photosynthesis

(a) Fig. 8.1 shows a scanning electron micrograph of a section through a leaf of the Christmas rose, *Helleborus niger*.   Name M and N. ...

2009 Summer

1

Theory

Photosynthesis

(a) In Queensland, Australia, the effect of the water-holding capacity of soil on the yield of sorghum and wheat was investigated. • Four test p...

2009 Winter

3

Theory

Photosynthesis

(a) In the majority of plants the leaf is the main photosynthetic organ. List four ways in which the structure of a dicotyledonous leaf is adapted for...

2009 Winter

2

Theory

Photosynthesis

Fig. 4.1 is a photomicrograph of a transverse section through the leaf of a C4 plant. (a) (i) Identify structures J to L. J  K L  (a)...

2010 Summer

Theory

Photosynthesis

(a) Explain how the palisade mesophyll cells of a leaf are adapted for photosynthesis. [8] (b) Outline the light-independent stage of photosynthesis....

2010 Summer

Theory

Photosynthesis

Cereal crops, such as sorghum and rice, are a major source of nutrients all over the world. (a) Explain why cereal crops are important components of ...

2010 Summer

Theory

Photosynthesis

(a) Describe the structure of photosystems and explain how a photosystem functions in cyclic photophosphorylation. [8] (b) Explain briefly how reduce...

2010 Summer

Theory

Photosynthesis

Cereal crops, such as sorghum and rice, are a major source of nutrients all over the world. (a) Explain why cereal crops are important components of ...

2010 Summer

Theory

Photosynthesis

(a) Describe the structure of photosystems and explain how a photosystem functions in cyclic photophosphorylation. [8] (b) Explain briefly how reduce...

2010 Summer

Theory

Photosynthesis

(a) In flowering plants, the light-dependent reactions are carried out by photosynthetic pigments which fall into two categories: primary pigments and...

2010 Winter

1

Theory

CH1 - CELL STRUCTURE

(a) Table 1.1 lists cell structures that can be found in eukaryotic cells or prokaryotic cells. Some of these cell structures can be found in both typ...

2023 Spring

5

Theory

CH2 - BIOLOGICAL MOLECULES

(a) Cysteine is an amino acid containing sulfur. Fig. 2.1 shows the structure of the molecule formed by joining two cysteine molecules together.Draw a...

2023 Spring

3

Theory

CH7 - TRANSPORT IN PLANTS

(a) Fig. 3.1 is a diagram of an area of phloem tissue from a transverse section through the stem of a squash plant, Cucurbita pepo.   (i) Cell ...

2023 Spring

3

Theory

CH10 - INFECTIOUS DISEASE

Tuberculosis (TB), influenza and polio are examples of infectious diseases.(a) (i) Explain what is meant by an infectious disease........................

2023 Spring

4

Theory

CH8 - TRANSPORT IN MAMMALS

Pneumonia is a severe lung disease that can interfere with gas exchange. A person with pneumonia can be connected to an ECMO machine. This machine per...

2023 Spring

6

Theory

CH2 - BIOLOGICAL MOLECULES

(a) Collagen is the most common structural protein in vertebrates. Collagen provides the skin with flexibility and strength.Explain how the structure ...

2023 Spring

3

Theory

CH14 - HOMEOSTASIS

(a) Fig. 1.1 is a drawing of a longitudinal section (LS) of a human kidney. Use the letters A, B, C and D in Fig. 1.1 to complete Table 1.1. Each ...

2023 Spring

3

Theory

CH19 - GENETIC TECHNOLOGY

(a) The start of transcription of the gene IFNA2 by E. coli with the recombinant plasmid shown in Fig. 2.1 needs to be controlled to obtain an optimum...

2023 Spring

3

Theory

CH19 - GENETIC TECHNOLOGY

Salmon can be genetically modified (GM) to produce increased quantities of growth hormone, which is a protein. GM salmon modified in this way have a f...

2023 Spring

3

Theory

CH16 - INHERITED CHANGE

Array comparative genome hybridisation (aCGH) is a technique involving the use of a microarray to analyse a genome or sections of a genome.(a) Outline...

2023 Spring

3